Is it normal that a "BBU has insufficient power" alarm is displayed on the ISM after a storage system is powered on or running for a while?

Yes. The condition triggering this alarm is that the BBU is being charged. After the BBU is fully charged, this alarm is cleared automatically.

If this alarm persists after a long period of time, replace the BBU with a new one and wait until the charging completes. If the alarm still persists, contact technical support engineers.

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